Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

doi:10.1088/1674-1056/21/11/114209

Abstract We theoretically present a method for generating an ultrabroad extreme ultraviolet (XUV) supercontinuum by using the combination of a multicycle chirped laser and a static electric field. At a low laser intensity, the spectral cutoff is extended to the 495th order harmonic, and the bandwidth of the supercontinuum spectrum is broadened to 535 eV. At a high laser intensity, the harmonic cutoff is enlarged to the 667th order, and the supercontinuum covering a bandwidth of 1035 eV is generated. In these two cases, the long quantum path is removed, and the short quantum path is selected. Especially for the relatively high laser intensity, an isolated 23-attosecond pulse with a bandwidth of about 170.6 eV is directly obtained. Finally, we also analyze the influences of the chirp parameter and the duration of the chirped pulse as well as the static field strength on the supercontinuum.

Keywords: high-order harmonic attosecond pulse generation supercontinuum combined field

Received: 10 April 2012
Revised: 17 May 2012
Accepted manuscript online:

PACS:	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)

Fund: Project supported by the Science Foundation of Baoji University of Arts and Sciences, China (Grant Nos. ZK10122, ZK11061, ZK11135, ZK11060, and ZK1032) and the Education Committee Natural Science Foundation of Shaanxi Province, China (Grant No. 2010JK405).

Corresponding Authors: Zhang Gang-Tai
E-mail: gtzhang79@163.com

Cite this article:

Zhang Gang-Tai (张刚台), Bai Ting-Ting (白婷婷), Zhang Mei-Guang (张美光 ) Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field 2012 Chin. Phys. B 21 114209

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Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

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